Model needs to explode upon throwing

So I'm trying to help make a halloween map for the FF clan, and I've borrowed a pumpkin model from the [img] http://www.brdstudio.net/ffmember/juim/dm_stinger_pumpkin.jpg[/img]
"Pumpkin Night" mod. I have the model, material/model files,and I need to know how to make it explodable/and gibby, like the melons in melon wars. Any help would be appreciated.
P.S. I can use just about any VMF file I want, just so slong as it holds a bunch of pumpkins for chucking. If you maybe have an unreleased VMF which you think may qualify I would be glad to use it, it most certainly would get alot of play this month.
P.S.S. Not required though.

I never actually got around to making a breakable model but, IIRC, you need to make all the individual gib pieces as seperate models, and include some lines in the main pumpkin model's .qc file that tells it to use those gibs when it gets broken.

I fooled around with this, you will need to decompile the model, edit the .qc to include explosive properties, then recompile making sure the texture information is correct in the.qc.

Here's what I did to make the hl2 gas pump throwable and explosive ( and also half-sized :O )

$cd "D:\STEAM\steamapps\xxx\sourcesdk_content\hl2mp\modelsrc\tinytown\gaspump"
$modelname "tinytown/gaspumptiny.mdl"
$scale 0.5
$model "Body" "gaspump001a_reference.smd"
$lod 20
{
replacemodel "gaspump001a_reference" "lod1_gaspump001a_reference"
}
$keyvalues
{
prop_data {
"dmg.bullets" "1.0" "dmg.club" "1.0" "dmg.explosive" "1.0" "health" "20" "explosive_damage" "120" "explosive_radius" "256" }
physgun_interactions {
"onfirstimpact" "break" }
fire_interactions {
"flammable" "yes" "explosive_resist" "yes" "ignite" "halfhealth" }
}
$cdmaterials "models\props_wasteland/"
// Model uses material "gaspump.vmt"
$surfaceprop "metal"
$illumposition 0.000 0.000 31.950
$sequence idle "idle" fps 30.00
$collisionmodel "phymodel.smd" {

$concave
$mass 64
$inertia 1.00
$damping 0.00
$rotdamping 0.00
}

Thanks, haymaker, what program could I use to de-compile a model?
Keep in mind, that I never have made a custom model yet.Although, given the proper basic instructions, I think I could do it.

I used this

http://chaosincarnate.net/cannonfodder/cftools.htm

to decompile. You will likely find that the direct gcf access with this doesn't work for HL2DM stuff, disable it if it gives you trouble. Of course your pumpkin isn't in the GCF, I would try putting it in /hl2mp/models/mapname/ if it isn't already there.

For recompiling I used the outline suggested here

http://www.interlopers.net/forum/viewtopic.php?f=11&t=2509&hilit=model+rescale

with this prog

http://developer.valvesoftware.com/wiki/GUIStudioMDL

Good luck. It's easy to miss something so check all your parameters twice! If all's well it will show up in a Hammer restart with all the flags of an exploding barrel.